I heard something awhile ago that was interesting - some person was studying these stories of UFO’s, Bigfoot, etc. from a human psychology angle. Assuming that they are just made up - what drives the human brain to come up with similar stories throughout time and culture and the world? So he was studying it from that viewpoint.
It ain't made up. I have seen sign in-situ... and there are thousands of plaster casts... Even prints with anomalies from having been broken... Footprints require feet. Maybe it's because I see things different - Sign means a lot to me - Very hard to replicate or invent with accuracy that would fool a tracker.